矩阵的最小路径和

def solve(____):
    grid = [list(map(int, row.split(____))) for row in grid.split(____)]
    m, n = len(____), len(____)
    dp = [[____] * n for _ in range(____)]
    dp[____][____] = grid[____][____]
    for i in range(____, m):
        dp[i][____] = dp[i - ____][____] + grid[i][____]
    for j in range(____, n):
        dp[____][j] = dp[____][j - ____] + grid[____][j]
    for i in range(____, m):
        for j in range(____, n):
            dp[i][j] = min(____) + grid[i][j]
    print(____)